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LG
E41
Grade A
41Ah
3.7V
966 ± 12 g
11.3 × 159 × 290.5 mm
1,000 cycles; ≥86% of first-cycle capacity; 25 ± 2°C; §4.1.3 cycling
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| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Manufacturer | LG Chem | Official Model | LQ1729-A2 |
| Cell Format | Rechargeable lithium-ion pouch cell | Cathode Chemistry | Not explicitly specified in the supplied document |
| Nominal Capacity | 41.4 Ah | Minimum Capacity | 41.0 Ah; standard charge/discharge at 25 ± 2°C |
| Nominal Voltage | 3.73 V | Nominal Energy | Approx. 154.42 Wh (calculated: 3.73 V × 41.4 Ah) |
| Body Dimensions (T × W × H) | 11.3 × 159 × 290.5 mm; height excludes terminals | Weight | 966 ± 12 g |
| Thickness Conditions | 11.3 ± 0.23 mm; shipping thickness measured under 30 kgf for 2 s | Standard Test Charge | 41.0 A CC-CV to 4.15 V; termination 2.05 A; 25 ± 2°C |
| Recommended Normal Charge | 12.0 A CC-CV to 4.126 V; termination 2.05 A; 10–45°C; voltage adjustment per datasheet | Recommended Semi-fast Charge | 41.0 A CC-CV to 4.126 V; termination 2.05 A; 20–40°C; voltage adjustment per datasheet |
| Standard Test Discharge | 41.0 A to 3.0 V; 25 ± 2°C | Maximum Discharge Rating | No single fixed continuous-current rating stated; follow SOC/temperature power curves |
| Discharge Resistance Example | 1.36 mΩ at 10 s; 1.77 mΩ at 30 s; 50% SOC, 200 A, room temperature, beginning of life | Continuous Operating Temperature | 10–45°C |
| Room-temperature Cycle Test | 1,000 cycles; ≥86% of first-cycle capacity; 25 ± 2°C; §4.1.3 cycling | High-temperature Cycle Test | 300 cycles; ≥87% of first-cycle capacity; 45 ± 2°C; §4.1.3 cycling |
| Pack Pressure Guide | Minimum required: 15 kPa; maximum allowed: 350 kPa | Long-term Storage | Dry environment, ≤25°C per handling instructions |
LG Chem LQ1729-A2 is a rechargeable lithium-ion pouch cell specified for electric vehicle applications. The supplied Rev. 1 document lists 3.73 V nominal voltage, 41.4 Ah nominal capacity and 41.0 Ah minimum capacity, with approximately 154.42 Wh of calculated nominal energy. MisenBattery supplies cells and supports custom pack evaluation using the manufacturer's charging recommendations, SOC-dependent power limits, cycle test conditions and mechanical integration guidance.
The specification distinguishes a nominal capacity of 41.4 Ah from a minimum capacity of 41.0 Ah under the defined standard charge and discharge procedure. This distinction supports accurate cell selection and pack sizing. Use the appropriate capacity basis for energy calculations, acceptance criteria and application testing rather than treating the two figures as interchangeable.
A nominal voltage of 3.73 V and nominal capacity of 41.4 Ah give approximately 154.42 Wh of calculated single-cell energy. This provides a reference for comparing proposed pack configurations. Usable system energy still depends on operating voltage limits, temperature, load profile and losses, and should be verified under the intended duty cycle.
Recommended normal charging uses 12.0 A at 10–45°C, while semi-fast charging uses 41.0 A at 20–40°C. Both list 4.126 V and a 2.05 A termination current, with voltage adjustment according to the datasheet. These operating recommendations are distinct from the 41.0 A, 4.15 V standard test procedure.
The document provides discharge resistance values across SOC rather than one universal internal resistance figure. At 50% SOC and room temperature, the listed values are 1.36 mΩ at 10 seconds and 1.77 mΩ at 30 seconds using a 200 A test. The system-imposed test ceiling does not establish a continuous-current rating.
At 25 ± 2°C, the specification requires at least 86% of first-cycle capacity after 1,000 cycles; at 45 ± 2°C, it requires at least 87% after 300 cycles. Both use the defined standard cycling procedure with 20-minute rests. These test-specific results support durability assessment without implying a universal pack service life.
The body measures nominally 11.3 × 159 × 290.5 mm, excluding terminals from the height, with a weight of 966 ± 12 g. Shipping thickness is measured under a defined load. The pack guide specifies 15 kPa minimum required pressure and 350 kPa maximum allowed pressure, supporting validated mechanical design.
Custom battery pack applications: MisenBattery supplies cells and supports custom pack evaluation for electric vehicle and industrial applications. Validate the duty cycle, cell condition and applicable specification revision. Integration requires a compatible BMS, fuse protection, voltage and temperature sensing, validated welded tab interconnects, insulation, cell spacing, thermal management and controlled mechanical pressure. Confirm applicable CE, UN38.3, RoHS and UL documentation for the specific cell, pack and shipment; the listed safety-test requirements do not establish certification status.
